go-couchdb-query-engine

CouchDB query implementation in Golang for in-memory object querying

Build status:

Features

• skip
• limit
• selector

Selector

The selector query accepts following couchdb operators:

• all
• and
• elematch
• eq
• exists
• gt
• gte
• in
• lt
• lte
• mod
• ne
• nin
• nor
• not
• or
• regex
• size
• type

Example code

Data

var TestData = map[string]interface{}{
	"MARBLE1": map[string]interface{}{
		"objectType": "MARBLE",
		"owner":      "bob",
		"size":       3,
		"previousOwners": []string{
			"alice",
			"donald",
		},
		"family": map[string]interface{}{
			"name":   "colored",
			"origin": "spain",
		},
	},
	"MARBLE2": map[string]interface{}{
		"objectType": "MARBLE",
		"owner":      "alice",
		"size":       1,
		"previousOwners": []string{
			"donald",
		},
		"family": map[string]interface{}{
			"name":   "white",
			"origin": "france",
		},
		"verification": []interface{}{
			map[string]interface{}{
				"organizationId": "marbles inspectors inc.",
				"checkedAt":      "2017-12-18T12:11:34.171Z",
				"score":          5,
			},
		},
	},
	"MARBLE3": map[string]interface{}{
		"objectType": "MARBLE",
		"owner":      "arnold",
		"size":       5,
		"previousOwners": []string{
			"alice",
		},
		"family": map[string]interface{}{
			"name":   "striped",
			"origin": "america",
		},
		"verification": []interface{}{
			map[string]interface{}{
				"organizationId": "marbles ID inc.",
				"checkedAt":      "2017-12-18T12:11:34.171Z",
				"score":          3,
			},
			map[string]interface{}{
				"organizationId": "marbles ID inc.",
				"checkedAt":      "2016-12-18T12:11:34.171Z",
				"score":          7,
			},
		},
	},
}

Method

res, err := query.ParseCouchDBQuery(TestData, map[string]interface{}{
			"selector": map[string]interface{}{
				"size": map[string]interface{}{
					"$eq": 3,
				},
			},
		})

Response

StateCouchDBQueryResult{
	StateCouchDBQueryObject{
		Key: "MARBLE0",
		Value: map[string]interface{}{
			"objectType": "MARBLE",
			"owner":      "bob",
			"size":       3,
			"previousOwners": []string{
				"alice",
				"donald",
			},
			"family": map[string]interface{}{
				"name":   "colored",
				"origin": "spain",
			},
		},
	},
}